6646769 has 2 divisors, whose sum is σ = 6646770. Its totient is φ = 6646768.

The previous prime is 6646699. The next prime is 6646777. The reversal of 6646769 is 9676466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6477025 + 169744 = 2545^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646769 - 2⁸ = 6646513 is a prime.

It is a super-2 number, since 2×6646769² = 88359076278722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6646669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323384 + 3323385.

It is an arithmetic number, because the mean of its divisors is an integer number (3323385).

Almost surely, 2^6646769 is an apocalyptic number.

It is an amenable number.

6646769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646769 is an equidigital number, since it uses as much as digits as its factorization.

6646769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 6646769 is about 2578.1328515032. The cubic root of 6646769 is about 188.0197749683.

The spelling of 6646769 in words is "six million, six hundred forty-six thousand, seven hundred sixty-nine".